Nancy's the GOAT when it comes to sports organists, glad she is coming back part time. She was playing some spring training games too in AZ so not entirely surprised.
EPSN (SportsCenter) did a spot on this way back. I can't find a YouTube link but you can watch it here: https://www.facebook.com/watch/?v=458680482015482 (if you have a Facebook account) But she and/or the Sox are credited for making it a thing in sports.
Not many great "live" organists left these days. Most of what you hear is just recorded crap spewed through the loudspeaker. Jeremy Boyer in STL is a good one.
also - little drunk side-tangent. The Sox also have an organist in the minors here in NC- "Greazy Keyz". Jason Atkins. Organist for the Checkers and has a spot in Kanny. He has a wireless "Keytar" he plays between innings on the concourse which is pretty cool.